本文整理了Java中org.json.JSONObject.length()方法的一些代码示例，展示了JSONObject.length()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JSONObject.length()方法的具体详情如下：
包路径：org.json.JSONObject
类名称：JSONObject
方法名：length

JSONObject.length介绍

[英]Returns the number of name/value mappings in this object.
[中]返回此对象中的名称/值映射数。

代码示例

代码示例来源：origin: commonsguy/cw-omnibus

@Override
public int getGroupCount() {
 return(model.length());
}

代码示例来源：origin: apache/geode

/**
 * @return the column size of this GfJsonObject
 */
public int size() {
 return jsonObject.length();
}

代码示例来源：origin: google/physical-web

/**
 * Create a JSON object that represents this data structure.
 * @return a JSON serialization of this data structure.
 */
public JSONObject jsonSerialize() {
 JSONObject jsonObject = new JSONObject();
 jsonObject.put(ID_KEY, mId);
 jsonObject.put(URL_KEY, mUrl);
 if (mExtraData.length() > 0) {
  jsonObject.put(EXTRA_KEY, mExtraData);
 }
 return jsonObject;
}

代码示例来源：origin: zzz40500/GsonFormat

/**
 * Get an array of field names from a JSONObject.
 *
 * @return An array of field names, or null if there are no names.
 */
public static String[] getNames(JSONObject jo) {
  int length = jo.length();
  if (length == 0) {
    return null;
  }
  Iterator<String> iterator = jo.keys();
  String[] names = new String[length];
  int i = 0;
  while (iterator.hasNext()) {
    names[i] = iterator.next();
    i += 1;
  }
  return names;
}

代码示例来源：origin: ACRA/acra

@NonNull
  public Map<String, Object> toMap() {
    final Map<String, Object> map = new HashMap<>(content.length());
    for (final Iterator<String> iterator = content.keys(); iterator.hasNext(); ) {
      final String key = iterator.next();
      map.put(key, get(key));
    }
    return map;
  }
}

代码示例来源：origin: google/physical-web

/**
 * Create a JSON object that represents this data structure.
 * @return a JSON serialization of this data structure.
 */
public JSONObject jsonSerialize() {
 JSONObject jsonObject = new JSONObject();
 jsonObject.put(REQUESTURL_KEY, mRequestUrl);
 jsonObject.put(SITEURL_KEY, mSiteUrl);
 if (mTitle != null) {
  jsonObject.put(TITLE_KEY, mTitle);
 }
 if (mDescription != null) {
  jsonObject.put(DESCRIPTION_KEY, mDescription);
 }
 if (mIconUrl != null) {
  jsonObject.put(ICONURL_KEY, mIconUrl);
 }
 if (mGroupId != null) {
  jsonObject.put(GROUPID_KEY, mGroupId);
 }
 if (mExtraData.length() > 0) {
  jsonObject.put(EXTRA_KEY, mExtraData);
 }
 return jsonObject;
}

代码示例来源：origin: loklak/loklak_server

/**
 * Get an array of field names from a JSONObject.
 *
 * @return An array of field names, or null if there are no names.
 */
public static String[] getNames(JSONObject jo) {
  int length = jo.length();
  if (length == 0) {
    return null;
  }
  return jo.keySet().toArray(new String[length]);
}

代码示例来源：origin: RipMeApp/ripme

@Override
public List<String> getURLsFromPage(Document doc) {
  List<String> result = new ArrayList<>();
  for (Element script : doc.select("script")) {
    if (script.data().contains("var images = ")) {
      String s = script.data();
      s = s.replaceAll("var seriesId = \\d+;", "");
      s = s.replaceAll("var chapterId = \\d+;", "");
      s = s.replaceAll("var pages = \\d+;", "");
      s = s.replaceAll("var page = \\d+;", "");
      s = s.replaceAll("var prevCha = null;", "");
      s = s.replaceAll("var nextCha = \\.*;", "");
      String json = s.replaceAll("var images = ", "").replaceAll(";", "");
      JSONObject images = new JSONObject(json);
      for (int i = 1; i < images.length() +1; i++) {
        result.add(images.getString(Integer.toString(i)));
      }
    }
  }
  return result;
}

代码示例来源：origin: json-path/JsonPath

@Override
public int length(Object obj) {
  if (isArray(obj)) {
    return toJsonArray(obj).length();
  } else if (isMap(obj)) {
    return toJsonObject(obj).length();
  } else {
    if (obj instanceof String) {
      return ((String) obj).length();
    }
  }
  throw new JsonPathException("length operation can not applied to " + obj != null ? obj.getClass().getName() : "null");
}

代码示例来源：origin: loklak/loklak_server

/**
 * cleanup deletes all old entries and frees up the memory.
 * some outside process muss call this frequently
 * @return self
 */
public Accounting cleanup() {
  if (!this.has("requests")) return this;
  JSONObject requests = this.getJSONObject("requests");
  for (String path: requests.keySet()) {
    JSONObject events = requests.getJSONObject(path);
    // shrink that map and delete everything which is older than now minus one hour
    long pivotTime = System.currentTimeMillis() - ONE_HOUR_MILLIS;
    while (events.length() > 0 && Long.parseLong(events.keys().next()) < pivotTime) events.remove(events.keys().next());
    if (events.length() == 0) requests.remove(path);
  }
  return this;
}

代码示例来源：origin: apache/hive

public void extractStagesAndPlans(JSONObject inputObject) throws Exception {
 // extract stages
 JSONObject dependency = inputObject.getJSONObject("STAGE DEPENDENCIES");
 if (dependency != null && dependency.length() > 0) {
  // iterate for the first time to get all the names of stages.
  for (String stageName : JSONObject.getNames(dependency)) {
   this.stages.put(stageName, new Stage(stageName, this));
  }
  // iterate for the second time to get all the dependency.
  for (String stageName : JSONObject.getNames(dependency)) {
   JSONObject dependentStageNames = dependency.getJSONObject(stageName);
   this.stages.get(stageName).addDependency(dependentStageNames, this.stages);
  }
 }
 // extract stage plans
 JSONObject stagePlans = inputObject.getJSONObject("STAGE PLANS");
 if (stagePlans != null && stagePlans.length() > 0) {
  for (String stageName : JSONObject.getNames(stagePlans)) {
   JSONObject stagePlan = stagePlans.getJSONObject(stageName);
   this.stages.get(stageName).extractVertex(stagePlan);
  }
 }
}

代码示例来源：origin: facebook/facebook-android-sdk

if (data.length() > 0) {
  newJsonObject.put("data", data);

代码示例来源：origin: apache/hive

Map<String, String> attrs = new TreeMap<>();
Vertex v = null;
if (opObj.length() > 0) {
 String[] names = JSONObject.getNames(opObj);
 for (String name : names) {
  } else if (o instanceof JSONObject) {
   JSONObject attrObj = (JSONObject) o;
   if (attrObj.length() > 0) {
    if (name.equals("Processor Tree:")) {
     JSONObject object = new JSONObject(new LinkedHashMap<>());

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testJsonObjectPutAll() throws JSONException {
  HashMap<String, Object> map = new HashMap<String, Object>();
  map.put("hello", "world");
  map.put("hocus", "pocus");
  JSONObject jsonObject = new JSONObject();
  JsonUtil.jsonObjectPutAll(jsonObject, map);
  assertEquals("pocus", jsonObject.get("hocus"));
  assertEquals(2, jsonObject.length());
}

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testJsonObjectClear() throws JSONException {
  JSONObject jsonObject = new JSONObject();
  jsonObject.put("hello", "world");
  jsonObject.put("hocus", "pocus");
  JsonUtil.jsonObjectClear(jsonObject);
  assertEquals(0, jsonObject.length());
}

代码示例来源：origin: loklak/loklak_server

@Override
public JSONObject[] service(Query call, Authorization rights) throws APIException {
  // make call to the embedded api
  if (this.serverProtocolHostStub == null) return new JSONObject[]{serviceImpl(call, null, rights, rights.getPermissions(this))};
  
  // make call(s) to a remote api(s)
  JSONObject[] results = new JSONObject[this.serverProtocolHostStub.length];
  for (int rc = 0; rc < results.length; rc++) {
    try {
      StringBuilder urlquery = new StringBuilder();
      for (String key: call.getKeys()) {
        urlquery.append(urlquery.length() == 0 ? '?' : '&').append(key).append('=').append(call.get(key, ""));
      }
      String urlstring = this.serverProtocolHostStub[rc] + this.getAPIPath() + urlquery.toString();
      byte[] jsonb = ClientConnection.download(urlstring);
      if (jsonb == null || jsonb.length == 0) throw new IOException("empty content from " + urlstring);
      String jsons = UTF8.String(jsonb);
      JSONObject json = new JSONObject(jsons);
      if (json == null || json.length() == 0) {
        results[rc] = null;
        continue;
      };
      results[rc] = json;
    } catch (Throwable e) {
      DAO.severe(e);
    }
  }
  return results;
}

代码示例来源：origin: ankidroid/Anki-Android

@Override
public void onRemoveSearch(String searchName) {
  Timber.d("OnRemoveSelection using search named: %s", searchName);
  try {
    JSONObject savedFiltersObj = getCol().getConf().optJSONObject("savedFilters");
    if (savedFiltersObj != null && savedFiltersObj.has(searchName)) {
      savedFiltersObj.remove(searchName);
      getCol().getConf().put("savedFilters", savedFiltersObj);
      getCol().flush();
      if (savedFiltersObj.length() == 0) {
        mMySearchesItem.setVisible(false);
      }
    }
  } catch (JSONException e) {
    throw new RuntimeException(e);
  }
}

代码示例来源：origin: cloudfoundry/uaa

@Override
public boolean matches(Object item) {
  if(!String.class.isInstance(item)){
    return false;
  }
  if(this.expected == null && "null".equals(item)){
    return true;
  }
  JSONObject actual = null;
  try {
    actual = new JSONObject(new JSONTokener(item.toString()));
  } catch (JSONException e) {
    return false;
  }
  if(this.expected.length() != actual.length()) {
    return false;
  }
  JSONArray names = actual.names();
  for(int i = 0, len = names.length(); i < len; i++){
    try {
      String name = names.getString(i);
      if(!Objects.equals(expected.get(name), actual.get(name))){
        return false;
      }
    } catch (JSONException e) {
      return false;
    }
  }
  return true;
}

代码示例来源：origin: apache/hive

plan.getOptimizedQueryString());
if (jsonPlan.getJSONObject(ExplainTask.STAGE_DEPENDENCIES) != null &&
  jsonPlan.getJSONObject(ExplainTask.STAGE_DEPENDENCIES).length() <=
    conf.getIntVar(ConfVars.HIVE_SERVER2_WEBUI_MAX_GRAPH_SIZE)) {
 ret = jsonPlan.toString();

代码示例来源：origin: loklak/loklak_server

public static JSONObject getUser(String screen_name, boolean forceReload) throws TwitterException, IOException {
  if (!forceReload) {
    JsonFactory mapcapsule = DAO.user_dump.get("screen_name",screen_name);
    if (mapcapsule == null) mapcapsule = DAO.user_dump.get("id_str", screen_name);
    if (mapcapsule != null) {
      JSONObject json = mapcapsule.getJSON();
      if (json.length() > 0) {
        // check if the entry is maybe outdated, i.e. if it is empty or too old
        try {
          Date d = DAO.user_dump.parseDate(json);
          if (d.getTime() + DateParser.DAY_MILLIS > System.currentTimeMillis()) return json;
        } catch (ParseException e) {
          return json;
        }
      }
    }
  }
  TwitterFactory tf = getUserTwitterFactory(screen_name);
  if (tf == null) tf = getAppTwitterFactory();
  if (tf == null) return new JSONObject();
  Twitter twitter = tf.getInstance();
  User user = twitter.showUser(screen_name);
  RateLimitStatus rateLimitStatus = user.getRateLimitStatus();
  getUserResetTime = System.currentTimeMillis() + rateLimitStatus.getSecondsUntilReset() * 1000;
  getUserRemaining = rateLimitStatus.getRemaining();
  JSONObject json = user2json(user);
  enrichLocation(json);
  DAO.user_dump.putUnique(json);
  return json;
}